Where does “basen” come from?

basen (Catalan) comes from Catalan basar, from Catalan base, from Latin basis, from Ancient Greek βάσις, from Proto-Hellenic gʷə́tis, from Proto-Indo-European gʷémtis, from Proto-Indo-European gʷem- — to step.

basen (Catalan): third-person plural present indicative of basar